package com.hipac.service.common;

import com.dyuproject.protostuff.LinkedBuffer;
import com.dyuproject.protostuff.ProtostuffIOUtil;
import com.dyuproject.protostuff.Schema;
import com.dyuproject.protostuff.runtime.RuntimeSchema;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.objenesis.Objenesis;
import org.objenesis.ObjenesisStd;

/**
 * Created by huqiang on 15/10/31.
 */
public class SerializationUtil {

    private static Map<Class<?>,Schema<?>> cachedSchema=new ConcurrentHashMap<Class<?>, Schema<?>>();

    private static Objenesis objenesis=new ObjenesisStd(true);

    private SerializationUtil(){

    }

    private static <T>Schema<T> getSchema(Class<T> cls){
        Schema<T> schema=(Schema<T>) cachedSchema.get(cls);
        if (schema==null){
            schema= RuntimeSchema.createFrom(cls);
            if (schema!=null){
                cachedSchema.put(cls,schema);
            }
        }
        return schema;
    }

    public static <T> byte[] serialize(T obj){
        Class<T>   cls=(Class<T>)obj.getClass();
        LinkedBuffer buffer=LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE);
        try{
            Schema<T> schema=getSchema(cls);
            return ProtostuffIOUtil.toByteArray(obj,schema,buffer);
        }catch (Exception e){
            throw new IllegalStateException( e.getMessage(),e);
        }finally {
            buffer.clear();
        }
    }

    public static  <T> T deserialize(byte[] data,Class<T>  cls){
        try {
            T message=(T)objenesis.newInstance(cls);
            Schema<T> schema=getSchema(cls);
            ProtostuffIOUtil.mergeFrom(data,message,schema);
            return message;
        }catch (Exception e){
            throw new IllegalStateException(e.getMessage(),e);
        }
    }
}
